* Formation: Mountains are typically formed by tectonic plate collisions, causing the Earth's crust to fold and uplift. Uluru, on the other hand, is a large inselberg (an isolated rock hill rising abruptly from a plain). It was formed by erosion, with softer rock layers weathering away, leaving behind the harder sandstone core.
* Size and Shape: While Uluru is incredibly large and imposing, it lacks the typical pointed peak or jagged ridges associated with mountains. It's more rounded and massive, with a relatively flat top.
* Geological Definition: Geologists generally classify a monolith as a single, massive rock formation, while mountains are more complex structures with multiple peaks, valleys, and slopes.
In short, Uluru is unique in its formation, size, and shape, making it a monolith rather than a mountain.